Braking function for brushless DC motor control
US8093844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jul 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control circuit that features a smart, two-phase braking operation is presented. The motor control circuit includes a motor drive circuit to apply a brake current to a coil of an external motor for active braking of the motor. The motor control circuit further includes a braking control circuit, coupled to the motor drive circuit and responsive to an externally generated control signal, to control the active braking by the motor drive circuit so that the active braking occurs in two phases. The two phases include a first phase that includes a first portion of the active braking and a second phase that includes back electromotive force (BEMF) voltage sensing and a second portion of the active braking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.